收到 iOS 推送通知时如何打开通知视图控制器？

Question

我在swift 4.2 工作，并收到来自FireBase 的推送通知。当我点击Notification 时，它会转到主页。但是我想去Notification页面。

这是Swift4.2、Xcode 9.3、iOS 12.1。过去，我尝试过但没有同时使用 Foreground 和 InActive 应用程序

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

        FirebaseApp.configure()

        UINavigationBar.appearance().barTintColor = UIColor(red: 0/255.0, green: 85/255.0, blue: 127/255.0, alpha: 1)
        UINavigationBar.appearance().tintColor = UIColor.white
        //        UINavigationBar.appearance().titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.white,NSAttributedString.Key.font: UIFont(name: "Roboto-Medium", size: 16)!]
        UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffset(horizontal: 0, vertical: -60), for:UIBarMetrics.default)
        UINavigationBar.appearance().isTranslucent = false

        UIApplication.shared.statusBarStyle = .lightContent

        IQKeyboardManager .shared().isEnabled = true
        IQKeyboardManager .shared().shouldResignOnTouchOutside = true
        IQKeyboardManager .shared().isEnableAutoToolbar = false

        if let notification = launchOptions?[.remoteNotification] as? [String: AnyObject] {

            // If your app wasn’t running and the user launches it by tapping the push notification, the push notification is passed to your app in the launchOptions

            let aps = notification["aps"] as! [String: AnyObject]
            UIApplication.shared.applicationIconBadgeNumber = 0


        }            

        if #available(iOS 10.0, *) {
            UNUserNotificationCenter.current().delegate = self
            let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
            UNUserNotificationCenter.current().requestAuthorization(
                options: authOptions,
                completionHandler: {_, _ in })
        } else {
            let settings: UIUserNotificationSettings =
                UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
            application.registerUserNotificationSettings(settings)
        }

        application.registerForRemoteNotifications()


        let mainview = UIStoryboard(name:"Main", bundle: nil).instantiateViewController(withIdentifier: "HomeViewController") as! HomeViewController
        let nav = UINavigationController.init(rootViewController: mainview)
        SideMenu = LGSideMenuController.init(rootViewController: nav)
        SideMenuView = UIStoryboard(name:"Main", bundle: nil).instantiateViewController(withIdentifier: "SideMenuViewController") as! SideMenuViewController
        SideMenu.rightViewStatusBarVisibleOptions = .onAll
        let rect = SideMenuView.view.frame;
        SideMenuView.view.frame = rect


        Messaging.messaging().delegate = self
        //        Siren.shared.wail()

        if launchOptions?[UIApplication.LaunchOptionsKey.remoteNotification] != nil {
            // Do your task here
            let dic = launchOptions?[UIApplication.LaunchOptionsKey.remoteNotification] as? NSDictionary
            let dic2 = dic?.value(forKey: "aps") as? NSDictionary
            let alert = dic2?.value(forKey: "alert") as? NSDictionary
            let category = dic2?.value(forKey: "title") as? String
            // We can add one more key name 'click_action' in payload while sending push notification and check category for indentifying the push notification type. 'category' is one of the seven built in key of payload for identifying type of notification and take actions accordingly
            if category == "News Added"
            {
                /// Set the flag true for is app open from Notification and on root view controller check the flag condition to take action accordingly
                AppConstants.sharedInstance.userDefaults.set(true, forKey: AppConstants.sharedInstance.kisFromNotificationSecond)
            }
            else if category == "1-2-1 notification"
            {
                AppConstants.sharedInstance.userDefaults.set(true, forKey: AppConstants.sharedInstance.kisFromNotificationThird)
            }
        }


        return true
    }

Answer 1

对于终止状态或终止状态：

在 AppDelegate.swift 文件中定义新属性

var isFromNotification = false

在 AppDelegate.swift 中进行以下更改并保持其余代码不变。

if launchOptions?[UIApplication.LaunchOptionsKey.remoteNotification] != nil {
    isFromNotification = true
    //other required code
}

转到您的 Homepage.swift 文件

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated).
    
    let appDelegate = UIApplication.shared.delegate as! AppDelegate
    if appDelegate.isFromNotification {
        appDelegate.isFromNotification = false
        //Push to your notification controler without animation
    }
}

更新：背景和前景状态

以上答案仅适用于 @Abu Ul Hassan 评论中提到的 Kill 状态

现在，让我们了解一下背景或前景状态的流程。

userNotificationCenter(_:didReceive:withCompletionHandler:) 方法在用户在后台或前台模式下点击通知时被调用。

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
    //other required code
    //Get current navigation controller and redirect into notification screen
    completionHandler()
}

How to grab current UIViewController or current UINavigationController

Answer 2

这里有两种情况需要处理，一种是application活着，另一种是不存在。

当应用程序处于活动状态时，您将在UserNotificationCenterDelegate 的didReceiveNotificationResponse 函数中收到回调。您可以进行相应的处理。

启动应用程序时，您必须使用从AppDelegate 中的didFinishLaunchingWithOptions 函数获得的UIApplication.LaunchOptionsKey.remoteNotification 键